2017 macos sierra mail sending stuck

The frustration of a stuck email sending issue!

I'm here to help you troubleshoot the issue with sending emails in macOS Sierra (10.12) Mail app. Here are some steps to help you resolve the problem:

Step 1: Check your internet connection

Ensure your internet connection is stable and working properly. Try opening a web browser and checking if you can access websites. If not, restart your router or modem and try again.

Step 2: Check your Mail settings

  1. Open Mail app and go to Mail > Preferences > Accounts.
  2. Select your email account and click on the "Account" tab.
  3. Check if your account settings are correct, including the email address, password, and server settings.
  4. Make sure the "Use SSL" option is enabled (if your email provider requires it).

Step 3: Check your Outgoing Mail Server (SMTP) settings

  1. Go to Mail > Preferences > Accounts > [Your Email Account] > Advanced.
  2. Check if the Outgoing Mail Server (SMTP) settings are correct, including the server address, port number, and authentication settings.
  3. Ensure the "Use Authentication" option is enabled (if required by your email provider).

Step 4: Disable and re-enable your email account

  1. Go to Mail > Preferences > Accounts.
  2. Select your email account and click on the "Edit" button.
  3. Uncheck the "Enable this account" option.
  4. Wait for 10 seconds and then re-check the "Enable this account" option.

Step 5: Clear Mail's cache and data

  1. Quit Mail app.
  2. Go to your user library folder (~/Library/Mail).
  3. Delete the "Envelope Index" and "Mail" folders.
  4. Restart Mail app and try sending an email again.

Step 6: Check for conflicts with other apps

  1. Close any other apps that may be interfering with Mail's functionality.
  2. Try sending an email again to see if the issue persists.

Step 7: Reset NTP (Network Time Protocol) settings

  1. Go to System Preferences > Date & Time.
  2. Click on the "Reset" button next to "Set time zone automatically using current location".
  3. Restart your Mac and try sending an email again.

Step 8: Reinstall Mail app

  1. Quit Mail app.
  2. Go to Applications > Utilities > Terminal.
  3. Type sudo rm -rf /Applications/Mail.app and press Enter.
  4. Restart your Mac and reinstall Mail app from the App Store.

If none of these steps resolve the issue, you may want to try resetting your Mail app's preferences or seeking assistance from your email provider's support team.

I hope these steps help you resolve the stuck email sending issue in macOS Sierra Mail app!